android videoview 的问题

package com.testmedia03;
import android.app.Activity;
import android.net.Uri;
import android.os.Bundle;
import android.widget.MediaController;
import android.widget.Toast;
import android.widget.VideoView;
public class MainActivity extends Activity {

private String path;
private VideoView mVideoView;

@Override
public void onCreate(Bundle icicle) {
super.onCreate(icicle);
setContentView(R.layout.videoview);
mVideoView = (VideoView) findViewById(R.id.surface_view);

// mVideoView.setVideoPath("/mnt/internal_sd/ttpod/mv/Justin.mp4");


mVideoView.setVideoURI(Uri.parse("file:///mnt/internal_sd/ttpod/mv/Justin.mp4"));
mVideoView.setMediaController(new MediaController(this));
mVideoView.requestFocus();
}
}

xml代码

android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
android:id="@+id/surface_view"
android:layout_width="wrap_content"
android:layout_height="match_parent" />

视频路径那样添加是没有问题的吧？

编译无错，调试的时候是黑屏 无法播放视频
08-19 02:24:15.429 3454-3454/? D/dalvikvm﹕ Late-enabling CheckJNI
08-19 02:24:15.469 3454-3460/? D/dalvikvm﹕ Debugger has detached; object registry had 1 entries
08-19 02:24:15.539 3454-3454/? D/mali_winsys﹕ new_window_surface returns 0x3000
08-19 02:24:15.569 3454-3454/? D/BlurayManager﹕ isBDDirectory(), pathStr = file:///mnt/internal_sd/ttpod/mv/Justin.mp4
08-19 02:24:15.619 3454-3465/? W/MediaPlayer﹕ info/warning (701, 0)

黑屏？是因为没播放出来吧

搂住问题解决了吗？